[ALSA] Implement support for Line-in capture on SB Live 24bit.

CA0106 driver
Notes: MIC capture not tested yet.
Signed-off-by: James Courtier-Dutton <James@superbug.co.uk>

sound/pci/ca0106/ca0106.h

 /*
  *  Copyright (c) 2004 James Courtier-Dutton <James@superbug.demon.co.uk>
  *  Driver CA0106 chips. e.g. Sound Blaster Audigy LS and Live 24bit
- *  Version: 0.0.20
+ *  Version: 0.0.21
  *
  *  FEATURES currently supported:
  *    See ca0106_main.c for features.
@@ -45,6 +45,8 @@
  *    Added I2C and SPI registers. Filled in interrupt enable.
  *  0.0.20
  *    Added GPIO info for SB Live 24bit.
+ *  0.0.21
+ *   Implement support for Line-in capture on SB Live 24bit.
  *
  *
  *  This code was initally based on code from ALSA's emu10k1x.c which is:
@@ -475,9 +477,56 @@
 						/* Causes interrupts based on timer intervals. */
 #define SPI			0x7a		/* SPI: Serial Interface Register */
 #define I2C_A			0x7b		/* I2C Address. 32 bit */
-#define I2C_0			0x7c		/* I2C Data Port 0. 32 bit */
-#define I2C_1			0x7d		/* I2C Data Port 1. 32 bit */
-
+#define I2C_D0			0x7c		/* I2C Data Port 0. 32 bit */
+#define I2C_D1			0x7d		/* I2C Data Port 1. 32 bit */
+//I2C values
+#define I2C_A_ADC_ADD_MASK	0x000000fe	//The address is a 7 bit address
+#define I2C_A_ADC_RW_MASK	0x00000001	//bit mask for R/W
+#define I2C_A_ADC_TRANS_MASK	0x00000010  	//Bit mask for I2c address DAC value
+#define I2C_A_ADC_ABORT_MASK	0x00000020	//Bit mask for I2C transaction abort flag
+#define I2C_A_ADC_LAST_MASK	0x00000040	//Bit mask for Last word transaction
+#define I2C_A_ADC_BYTE_MASK	0x00000080	//Bit mask for Byte Mode
+
+#define I2C_A_ADC_ADD		0x00000034	//This is the Device address for ADC 
+#define I2C_A_ADC_READ		0x00000001	//To perform a read operation
+#define I2C_A_ADC_START		0x00000100	//Start I2C transaction
+#define I2C_A_ADC_ABORT		0x00000200	//I2C transaction abort
+#define I2C_A_ADC_LAST		0x00000400	//I2C last transaction
+#define I2C_A_ADC_BYTE		0x00000800	//I2C one byte mode
+
+#define I2C_D_ADC_REG_MASK	0xfe000000  	//ADC address register 
+#define I2C_D_ADC_DAT_MASK	0x01ff0000  	//ADC data register
+
+#define ADC_TIMEOUT		0x00000007	//ADC Timeout Clock Disable
+#define ADC_IFC_CTRL		0x0000000b	//ADC Interface Control
+#define ADC_MASTER		0x0000000c	//ADC Master Mode Control
+#define ADC_POWER		0x0000000d	//ADC PowerDown Control
+#define ADC_ATTEN_ADCL		0x0000000e	//ADC Attenuation ADCL
+#define ADC_ATTEN_ADCR		0x0000000f	//ADC Attenuation ADCR
+#define ADC_ALC_CTRL1		0x00000010	//ADC ALC Control 1
+#define ADC_ALC_CTRL2		0x00000011	//ADC ALC Control 2
+#define ADC_ALC_CTRL3		0x00000012	//ADC ALC Control 3
+#define ADC_NOISE_CTRL		0x00000013	//ADC Noise Gate Control
+#define ADC_LIMIT_CTRL		0x00000014	//ADC Limiter Control
+#define ADC_MUX			0x00000015  	//ADC Mux offset
+
+#if 0
+/* FIXME: Not tested yet. */
+#define ADC_GAIN_MASK		0x000000ff	//Mask for ADC Gain
+#define ADC_ZERODB		0x000000cf	//Value to set ADC to 0dB
+#define ADC_MUTE_MASK		0x000000c0	//Mask for ADC mute
+#define ADC_MUTE		0x000000c0	//Value to mute ADC
+#define ADC_OSR			0x00000008	//Mask for ADC oversample rate select
+#define ADC_TIMEOUT_DISABLE	0x00000008	//Value and mask to disable Timeout clock
+#define ADC_HPF_DISABLE		0x00000100	//Value and mask to disable High pass filter
+#define ADC_TRANWIN_MASK	0x00000070	//Mask for Length of Transient Window
+#endif
+
+#define ADC_MUX_MASK		0x0000000f	//Mask for ADC Mux
+#define ADC_MUX_MIC		0x00000002	//Value to select Mic at ADC Mux
+#define ADC_MUX_LINEIN		0x00000004	//Value to select LineIn at ADC Mux
+#define ADC_MUX_PHONE		0x00000001	//Value to select TAD at ADC Mux (Not used)
+#define ADC_MUX_AUX		0x00000008	//Value to select Aux at ADC Mux
 
 #define SET_CHANNEL 0  /* Testing channel outputs 0=Front, 1=Center/LFE, 2=Unknown, 3=Rear */
 #define PCM_FRONT_CHANNEL 0
@@ -513,6 +562,7 @@ typedef struct {
         char * name;
         int ac97;
 	int gpio_type;
+	int i2c_adc;
 } ca0106_details_t;
 
 // definition of the chip-specific record
@@ -555,3 +605,6 @@ void snd_ca0106_ptr_write(ca0106_t *emu,
 				   unsigned int chn, 
 				   unsigned int data);
 
+int snd_ca0106_i2c_write(ca0106_t *emu, u32 reg, u32 value);
+
+

sound/pci/ca0106/ca0106_main.c

 /*
  *  Copyright (c) 2004 James Courtier-Dutton <James@superbug.demon.co.uk>
  *  Driver CA0106 chips. e.g. Sound Blaster Audigy LS and Live 24bit
- *  Version: 0.0.22
+ *  Version: 0.0.23
  *
  *  FEATURES currently supported:
  *    Front, Rear and Center/LFE.
@@ -77,6 +77,8 @@
  *    Add SPDIF capture using optional digital I/O module for SB Live 24bit. (Analog capture does not yet work.)
  *  0.0.22
  *    Add support for MSI K8N Diamond Motherboard with onboard SB Live 24bit without AC97. From kiksen, bug #901
+ *  0.0.23
+ *    Implement support for Line-in capture on SB Live 24bit.
  *
  *  BUGS:
  *    Some stability problems when unloading the snd-ca0106 kernel module.
@@ -173,15 +175,18 @@ static ca0106_details_t ca0106_chip_details[] = {
 	 /* New Sound Blaster Live! 7.1 24bit. This does not have an AC97. 53SB041000001 */
 	 { .serial = 0x10061102,
 	   .name   = "Live! 7.1 24bit [SB0410]",
-	   .gpio_type = 1 } ,
+	   .gpio_type = 1,
+	   .i2c_adc = 1 } ,
 	 /* New Dell Sound Blaster Live! 7.1 24bit. This does not have an AC97.  */
 	 { .serial = 0x10071102,
 	   .name   = "Live! 7.1 24bit [SB0413]",
-	   .gpio_type = 1 } ,
+	   .gpio_type = 1,
+	   .i2c_adc = 1 } ,
 	 /* MSI K8N Diamond Motherboard with onboard SB Live 24bit without AC97 */
 	 { .serial = 0x10091462,
 	   .name   = "MSI K8N Diamond MB [SB0438]",
-	   .gpio_type = 1 } ,
+	   .gpio_type = 1,
+	   .i2c_adc = 1 } ,
 	 { .serial = 0,
 	   .name   = "AudigyLS [Unknown]" }
 };
@@ -257,6 +262,59 @@ void snd_ca0106_ptr_write(ca0106_t *emu,
 	spin_unlock_irqrestore(&emu->emu_lock, flags);
 }
 
+int snd_ca0106_i2c_write(ca0106_t *emu,
+				u32 reg,
+				u32 value)
+{
+	u32 tmp;
+	int timeout=0;
+	int status;
+	int retry;
+	if ((reg > 0x7f) || (value > 0x1ff))
+	{
+                snd_printk("i2c_write: invalid values.\n");
+		return -EINVAL;
+	}
+
+	tmp = reg << 25 | value << 16;
+	snd_ca0106_ptr_write(emu, I2C_D0, 0, tmp);
+	snd_ca0106_ptr_write(emu, I2C_D1, 0, tmp);
+
+	for(retry=0;retry<10;retry++)
+	{
+		/* Send the data to i2c */
+		tmp = snd_ca0106_ptr_read(emu, I2C_A, 0);
+		tmp = tmp & ~(I2C_A_ADC_READ|I2C_A_ADC_LAST|I2C_A_ADC_START|I2C_A_ADC_ADD_MASK);
+		tmp = tmp | (I2C_A_ADC_LAST|I2C_A_ADC_START|I2C_A_ADC_ADD);
+		snd_ca0106_ptr_write(emu, I2C_A, 0, tmp);
+
+		/* Wait till the transaction ends */
+		while(1)
+		{
+			status = snd_ca0106_ptr_read(emu, I2C_A, 0);
+                	//snd_printk("I2C:status=0x%x\n", status);
+			timeout++;
+			if((status & I2C_A_ADC_START)==0)
+				break;
+
+			if(timeout>1000)
+				break;
+		}
+		//Read back and see if the transaction is successful
+		if((status & I2C_A_ADC_ABORT)==0)
+			break;
+	}
+
+	if(retry==10)
+	{
+                snd_printk("Writing to ADC failed!\n");
+		return -EINVAL;
+	}
+    
+    	return 0;
+}
+
+
 static void snd_ca0106_intr_enable(ca0106_t *emu, unsigned int intrenb)
 {
 	unsigned long flags;
@@ -1177,6 +1235,10 @@ static int __devinit snd_ca0106_create(snd_card_t *card,
 	//outl(0x00000009, chip->port+HCFG);
 	outl(HCFG_AC97 | HCFG_AUDIOENABLE, chip->port+HCFG); /* AC97 2.0, Enable outputs. */
 
+        if (chip->details->i2c_adc == 1) { /* The SB0410 and SB0413 use I2C to control ADC. */
+	        snd_ca0106_i2c_write(chip, ADC_MUX, ADC_MUX_LINEIN); /* Enable Line-in capture. MIC in currently untested. */
+	}
+
 	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
 				  chip, &ops)) < 0) {
 		snd_ca0106_free(chip);

sound/pci/ca0106/ca0106_proc.c

 /*
  *  Copyright (c) 2004 James Courtier-Dutton <James@superbug.demon.co.uk>
  *  Driver CA0106 chips. e.g. Sound Blaster Audigy LS and Live 24bit
- *  Version: 0.0.17
+ *  Version: 0.0.18
  *
  *  FEATURES currently supported:
  *    See ca0106_main.c for features.
@@ -39,7 +39,9 @@
  *    Modified Copyright message.
  *  0.0.17
  *    Add iec958 file in proc file system to show status of SPDIF in.
- *    
+ *  0.0.18
+ *    Implement support for Line-in capture on SB Live 24bit.
+ *
  *  This code was initally based on code from ALSA's emu10k1x.c which is:
  *  Copyright (c) by Francisco Moraes <fmoraes@nc.rr.com>
  *
@@ -407,6 +409,20 @@ static void snd_ca0106_proc_reg_write(snd_info_entry_t *entry,
         }
 }
 
+static void snd_ca0106_proc_i2c_write(snd_info_entry_t *entry, 
+				       snd_info_buffer_t * buffer)
+{
+	ca0106_t *emu = entry->private_data;
+        char line[64];
+        unsigned int reg, val;
+        while (!snd_info_get_line(buffer, line, sizeof(line))) {
+                if (sscanf(line, "%x %x", &reg, &val) != 2)
+                        continue;
+                if ((reg <= 0x7f) || (val <= 0x1ff)) {
+                        snd_ca0106_i2c_write(emu, reg, val);
+		}
+        }
+}
 
 int __devinit snd_ca0106_proc_init(ca0106_t * emu)
 {
@@ -429,6 +445,13 @@ int __devinit snd_ca0106_proc_init(ca0106_t * emu)
 		entry->c.text.write_size = 64;
 		entry->c.text.write = snd_ca0106_proc_reg_write;
 		entry->mode |= S_IWUSR;
+//		entry->private_data = emu;
+	}
+	if(! snd_card_proc_new(emu->card, "ca0106_i2c", &entry)) {
+		snd_info_set_text_ops(entry, emu, 1024, snd_ca0106_proc_i2c_write);
+		entry->c.text.write_size = 64;
+		entry->c.text.write = snd_ca0106_proc_i2c_write;
+		entry->mode |= S_IWUSR;
 //		entry->private_data = emu;
 	}
 	if(! snd_card_proc_new(emu->card, "ca0106_regs2", &entry))